Java JSON Tutorials with Examples

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JSON (JavaScript Object Notation) is a simple, lightweight and easy to read and write data exchange formats. In Java, normally we use Jackson, Gson, JSON-P or JSON.simple popular libraries to parse JSON in Java.

1. Jackson

Jackson is a very popular and efficient Java-based library to serialize or map Java objects to JSON and vice versa. This tutorial contains a large number of articles/posts which demonstrates the basic and advanced Jackson library API features and their usage with lots of examples.

• Jackson - Convert Java Object to/from JSON Example  (popular)

• Jackson - List, Set, and Map Serialization and Deserialization in Java Examples

• Change Field Name in JSON using Jackson  (popular)

• How to Read / Write JSON Using Jackson JsonParser and JsonGenerator

• Jackson - Enable Pretty Print JSON Output  (popular)

• Jackson @JsonPropertyOrder Example

• Jackson - Ignore Fields or Properties on Serialization

• Jackson @JsonIgnore, @JsonIgnoreProperties and @JsonIgnoreType  (popular)

• Jackson Ignore Null and Empty Fields on Serialization  (popular)

• Jackson @JsonInclude Example

• ObjectMapper - Java to JSON (popular)

• ObjectMapper - JSON to Java Object (popular)

• Convert List to JSON Array Using Jackson (popular)

• Convert Set to JSON Array Using Jackson (popular)

• Jackson - Convert Map to JSON Object (popular)

• Jackson – Convert JSON string to Map (popular)

The source code of these examples and tutorials available on my GitHub repository at https://github.com/RameshMF/jackson-json-tutorial

2. GSON

Gson is a Java library that can be used to convert Java Objects into their JSON representation and vice-versa.

Below are GSON examples:

• GSON - Serialize and Deserialize Primitives Types

• Convert Java Object to JSON using GSON

• Convert JSON to Java Object using GSON

• GSON - Serialize and Deserialize Collections Example

• GSON - Serializing and Deserializing Generic Types

• GSON - Serializing and Deserializing Enums

• Gson - Serializing Inner Classes Example

• GSON - Array and Multi-Dimensional Array Example

• GSON - Custom Serialization and Deserialization Examples

• GSON - Excluding fields from JSON with @Expose Annotation

• GSON - Null Object Support

• GSON - Version Support Example

• Convert JSON to a Map Using Gson

The source code of these examples and articles are available on my GitHub repository at https://github.com/RameshMF/gson-tutorial

3. JSON-P

• Java JSON Processing Tutorial

4. JSON.simple

• JSON.simple Tutorial - Read and Write JSON in Java